system-create-mcp-tool

system-create-mcp-tool is a skill for Claude Code, Codex from webdevelopers-eu/zolinga. It costs 82 tokens per session (2,555 once invoked), scanned A, original, no licence file.

A guide to exposing a Zolinga event handler as an MCP tool. MCP, or Model Context Protocol, lets clients call tools through a standard JSON-RPC interface.

In plain words
What is it for?
Making a Zolinga event handler available to MCP clients through tools/list and tools/call.
Why use it?
It covers the required handler, manifest, input and output schemas, and call contract needed for the tool to work correctly.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/webdevelopers-eu/zolinga/system-create-mcp-tool
Any agent
npx skills add webdevelopers-eu/zolinga --skill system-create-mcp-tool
Clone the repo
git clone --depth 1 https://github.com/webdevelopers-eu/zolinga

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for system-create-mcp-tool

README.md
[![agentmods](https://agentmods.dev/badge/skills/webdevelopers-eu/zolinga/system-create-mcp-tool.svg)](https://agentmods.dev/skills/webdevelopers-eu/zolinga/system-create-mcp-tool)
Your own site
<a href="https://agentmods.dev/skills/webdevelopers-eu/zolinga/system-create-mcp-tool"><img src="https://agentmods.dev/badge/skills/webdevelopers-eu/zolinga/system-create-mcp-tool.svg" alt="Measured on agentmods" height="20"></a>
Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,555 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00082 $0.02555
Opus 5 $0.00041 $0.01277
Sonnet 5 $0.00016 $0.00511
Haiku 4.5 $0.00008 $0.00255

Measured 3d ago against content hash 0deddec66e69, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

system-create-mcp-tool scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X POST http://localhost:8080/mcp -D /dev/stderr \
system/skills/system-create-mcp-tool/SKILL.md · 206 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 206 lines · 82 tokens per session scan A 0deddec66e69

Subscribe to this mod's changes

system-create-mcp-tool is a skill published in the GitHub repository webdevelopers-eu/zolinga (5 stars, last pushed 4d ago), with no licence file. It adds 82 tokens to every session and 2,555 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.